Localizing apparatus.



J. B. KELLEY. LOOALIZIIG APPARATUS- nruornol nun no. u; "on.

Pmntod July 28, 1910.

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LOOALIZIIO LPPABAI'M. APPLIOA'HOI run no, a. 1m.

965,195. Patented July 26. 1910.7

4 TTORNE Y.

. any

' is that the operator can-ascertain accurately- Toollwhomitmay concern:

JOHN ROBERT KELLEY, OI CINCINNATI, OHIO.

Lccamzma arramurus.

Specification of Letters Patent.

Application Illed August 18. I809. lertal Io. 513.4".

Be it known that I, Joi ii RosizirrKsnuzr, a citizen of the United States, and a resident of the city of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful lm rovemenls in Loulizing A paratus, of which the followin is a speci cation.

e several features of my invention and the various advantages resu ting from their nae conjo'intly or otherwise will be a parent from the following descri tion and c lll llfl.

I the accompanying rawings making a r301 this specification, and in which simiar letters oflreference indicate correspondin arts,-Fignre 1 is a view in pcrspect've et tlie mechanism of the apparatus wh ch constitutes my invention. F g. 2 is a view in perspective of the loc ilizing instrument. i 3 is a top view of he device for holdinfithe photographic plate. Fi 4 is a dctai partly in section and art y in elevation of one of the universe joints. F ig. 5 is a view in perspective of another EOBIUOII of dt'he table, plate holder, pad-brac et and I will now proceed to describe my invention.

I constitute the localizing, separable and adjndable device as follows: A indicates the basal block or foundation iece of at weight to insure stability. he see of the standard B is cut away so as to bee straight edge So formed, this base A will not interpose any of itself in the path of the Roen n ray, and will therefore prevent ration or confusion in the skisgram. In case the table has any straight croaa line, such as marked thereon or as in the present instance the strai ht edge of the art H, or the part II, this at ed can be Ee'pt parallel to such edge, and hue aline with the hotographic late. Fixed to this basal him-ii is an u-prigh rod n. This rod .8 is preferablfi, in cross section, round, except at one side where it is flat. This rod has a scale of measurements, preferabl in millimeters, and this flat side of the r is a con venient place -on which to mark the said graduations. The advantage of such a scale the hei t of the indicator (ball D) above the aur ace of the table, and such knowledge will assist in the measurements necessary to accurately determine the ition of the foreignibody in the atlec eye. On this red B is located a holder (1, sliduble up and down on the said rod. The opening (F of the holder and through which the rod ll extends is preferably circular in cross sect ion. Preferred menus for setting it at any desired height on the rod consists of the set screw C whose screw thread engages ii female screw in the holder. This set screw C extends through the holder C and bears against tiie-tlat,side B of the rod B. The set screw C has a thumb or finger preferably of the form of a disk iavin a milled edge, whereby, when the holder C has been moved to the correct height on the rod B, this set screw C ma be advanced and hold the holder C at suc place on the said rod B, or which the holder is to be moved up or down on the rod B, or to he removed therefrom, this set nut (1' is retracted. This holder carries a tube 0, extendin both in front and rear of the holder 0. he forward end of this tube C has a slot C. The length of this slot may, of course, be varied to suit the demands of the particular work involved. A Ipreferred length for the purpose for wliic this invention was primarily made makes the slot of such lengt relative to the thickness of the projection F that the rod F and the indicators, viz.: the ball D and the cone E carried thereby can travel te n millimeters. This distance is very sli htlyi in excess of the length of the eyehe i. he rear end of this tube C"carries an abutment C. This abutment C is adn ted to be adjusted on the tube C, and or this purpose is provided with an o ning C: to receive the tube C, and it is pre erably slitted at C. A set screw C" extends into the abutment C' and across this slit C, and holds the abutment C clamped tightly on the tube C.

There are present in this mechanism two liail'isontally projecting rods. The upper D' carries at its outer and forward end a ball D. The lower rod E carries at its outer and forward end a cone E. The parse of making the lower indicator E of a iflereut shape to wit: of the form of ;a cone, is to enable the two indicators to be readily distinguished from one another on the skiagram. The ball D is above the cone Patented July 26, it 0.

E. The rear ends of these parallel rods D l and E are duly connected to a bracket F, adapted to permit of these rods D and E and their res iective terminals D and E being adjus nearer together or farther apart, and lhe nid terminals being set .ide

nearer to, or further from the hrnekot F. d lut the brat-Let is slitted above at l, whirl: .\lit reeeirm the rod l)", and the hrnrhet lh .slilted below at i \rhieh slit receives the rod i'l. Set. arrows 1" res eetirelv operate to hold the slitted parts oi the llltttlit'l. a 'ainst the rod l) or i) loeated in said lerneliet. thereby clamping the rods 1) and I? in the (twirl-d relatire position, one to the other. The) are. to be lifter-u millimeters apart, and are so set when the instrument is made. thereby obviating the necessity ot' the operator resetting them. The bracket l" is supported by a rod F", which rod extends throu h the said tube (3 and renrwm'dly beyontrlhis tube (7'', and terminates in an abutment i Forward of the holder (1, this rod F is provided with a detent. l', which extends upward in the slot C, and limits the distance to whirh the rod F can slide back and forth. The abutment F is preferably clamped on the rod F" and to this end has an opening I to receive the said rod F. From this slitted opening 1* to its lower end it. is slitted at F" and this slitted portion is drawn tom-ther and caused to tightly embraee the mt l""' by the tightening screw F'. The upper end of this abutment F is rel-eased at. 1", and enrries a steel cross bar F'", whieh may be termed the trigger bar. A trigger 1"" is iivotally eonneeted to the. abutn-ent (1. '1- ds trigger F" is provided with a eateh 1"": A spiral spring F emliraetw' the rod F" and is compressed between the end of the tube J" and the abutment. F'". The mode in which this trigger F", l""" operates in as follows: 'hell the bracket 1 with the rods 1), E and the rod 1"" and abutment F, are moved forward, the holder with its tube 3" and its-ahutmept. U remaining stationary, the bar F moves lnwluvurd and lifts the trigger 1"", until the rah-h F" falls behind the bar F". By this operation the spring F' is tftbillllltfifitti. Then the device in in rendition for a use. hereinafter mentioned. \Vhen the o ierutor de resses the. trigger by means of 1 to handle l thereof, ho disengages the trig or catch F" from the bar F, and the. rm 'F impelled by the spring F, moves ha'rkward through the holder C and tube C until the. tititlli. I strikes the rear end of the slot G" of the tube C, at which the extent of the rear travel of the ball 1) and the cone E is determined.

The instrumen is provided with two sights for obtaining the aLinement hereinafter mentioned. ()ne of tillese sights, a notched one F, is ireferably loeated as shown on the bracket l". The other of these sights, preferably a, peep sight may be located an shown on the abutment. C.

In connection with this l 'alizer, I proa eonvenient mechanism for sustaining? and holding the head of the patient, am for enabling the localizer to be located in the pro )tll' position relative to that eye of the patient. of which a skiagram is to be taken, and also for supportin the standards K and L, and also for em ling a Show graphie plate to be adjusted an hel in a proper position for the Roentgen (X)-ray employed to properly print upon the sensetized plate an image of the foreign body lodged in the said e e, and of the indicators 1'1 and I) from whie the position of the foreign body is determined.

(1} indicates a-table dul supported on legs of a pro )tl" length. a it is intended that ordinaril y, during the investigation of where in the eye the foreign body is l0- eated, the patient shall lie upon an 0 mting table on his or her side the heig ts of the legs G are such as,to elevate the table (i so that while the shoulder is upon the operating table, the head shall be supported at a height convenient. to the patient and eomfortable to him. In the bottom of each leg G is, for obvious .reaaonl, a rubber ahoo z or tip G. v

A clamp to hold the head of the patient firmly in a stationary position i; rovldod. This elam is duly supported an for the purpose o having the parts of the machine very eompaet relatively to one another, and the whole machine to be in one, I erect'u the table the vertical atafi' or rod K. is rod K in turn an rts the horiwntal bracket piece K. o latter is provided with a tug K havin a vertical a rture, which letter receives t to upright K. A set. screw K screwed throu tho hing K and bearing against the uprt t rod enables the bracket piece K to not in a higher or lower plane above the table G aa'oecasion may require. Each end portion of this hraeket K carries a head clam or one of which ehunpe I have mark 1!, an the other of said clampa I have marked N. l'lneh clamp is properly a diacal pad, Each clamp is connected to a rod P by a universal joint I. Each rod P extends th an opening in that end of the bracket K which carries it. A thumb nut. P acrowd upon the recent} of the rod P .enabloa the rod more readib' to be manipulated and moved through the said 0 ning in the bracket, and thus carry the heat pad nearer to or farther from the op to head pod.

K screwed tli ugh the said end ol! of the bracket abuts against; the rod and onables the o tor after moving the head pad to the esired position to not, it, by'advanein the set screw K forcibly against the Sui rod.

The head pad M is larger than the head pad N. In practice; the head pad I! is designed to bear against the back oftho head,

and the. illltllltl llttttl pad N to hear a ninst. the forehpad of the patient. llireet v beneaih the front portion of the. head of the patient, :iul t fore obviously below the eyes of the phtil-nt, the upper surface of t e table G is of a plate or plates ll preferahl of celluloid or other transparent matcri'a that is, of a material which does not interfere with the easy and rapid penetration of the Roentgen ray. The other part or parts H, H, of the table are of metallic material, and are opurplc to the penetration of the Roentgen ray t uring the short time required for exposure revision is made for sup orting the ph'otographic plate on which the pi -tum is to be photographed by the Roent en ray. A bottom ,0! supplemental table I is made fast to the table, and is located at. such a distance below the table top ll. H, H, as to allow of the introduction therein of a plate holder R. This holder preferably consists of a frame It". having t'ut'ttt'IS R for the support of this photographic plate. This sensitized plate is covered with a suitable protecting envelop which excludes ordinnrv white li ia, and is brought and laid on said holder t, and by it carried into the space upon the supplenu-ntal table. This plate is double the size required for one exposu e, viz.: for one. skiagram aml is utilized for the two skiagrams required to be taken in connect ion with the aforedescribed mechanism.

In order to correctly advance the aforcdescribed sensitized plate. I provide a convenicnt go, as follows: On the handle R of this ramcRare two irojectionsrespectively marked R and R". hen the holder R carr 'ing the sensitized late is pushed in under t to table ll, ll, as ar as the projection lt", the lllh't half of the. sensitized plate will be resent under the said trans mrent medium I. and upon it the. first skiagram will be taken. While this first picture is being made, the second half of the sensitized plate is protected from the Roentgen ray by the said IlUIl-Ptllfill'tllllt! plate ll. \Vhen the second picture is to be taken, the holder R is moved still farther under the table and as far as the projection R of the handle R. The first hall of the plate has now passed under the metallic plate ll of the farthest end of the table, and the second and as yet fresh half'of the plate is now in position 'underthe ilatc ll. While this second picture is being made, the first half of the sensitized )late on which a picture has been already talten is protected by the non-penetrnhle table ll.

It should he noted that. the standard L is similar to the standard K, and is atlixed to the table (5. at a mint, u'efernhly located as near one end of t 1e tab 0 as the standard K is located near the other end thereof. Both),

of thcseistandards K and l, are preferably near the same side edge. of the table. The shuuhud l is adapted to allow the bracket 'K' to he atlixcd to it, similarly as is the standard h.

The mode. in which my invention is operated is as follows: The patient, of whose eye the skia'=,ra|ns are to be made, lies upon an op -rating table, preferably a table of line regular compression diaphra type, and his head rests upon the localizing ta de G. The head of the patient is now fixed in said position by the means for the purpose, Wllltl are. adjusted as follows: The pad N is located against his forehead and set there by its rod P and the set screw K. Thepad M is located against the hack of his head and is set there by its rod 1' and set screw K.

The. affected eye should be nearest to the sensitized plate and should therefore be nearest the table G. The visual axis of the eye should be parallel to the plane of the said photo raphic plate. To accomplish this latter com ition, a convenient means is a lighted candle located at a distance of about fifteen feet from the head of the patient, and in front of the face and in a horizontal plane as far above the plane of the table G as the atl'ected eye is above the level of the localizing table G. By these means the visual axes are rendered approximately parallel tn the late. It is now necessary to locate the in icators l) and E in position on the table G. It is to he noted that the ball 1) and the cone E are a fixed distance apart. In the present instance they are fifteen millimeters apart. Ihc cone E is toward the lower temporal side of the head. The ball D and the cone E are moved forward from their supporting post B and the trigger F", F is set. The lm-alizing instrument is advunred toward the eye of the patient until the ball 1) and the cone 1') are near the e e of the patient. The localizing device (0- calizer) is now sighted. The 0 )erator now moves the localizer on the tab e until the post B of this device is in a line with the candle at the rear and with the cornea of the ati'ected eye of the patient. The 0 rator new proceeds to ill just the ball 1) directly opposite the. centerof the cornea of the eye. He sights through the peep night C" and through the notched sight F". He brings the peep and notched sights into vertical alinemcnt with the center of the cornea by moving the hall to the right or left as mav be necessary. He raises or lowers the ball D and those parts tixcd to and with it, until this hall is opposite the center of the cornea of the eye, amt thus secures the horizontal aline n'ent of the iarts.

'lhe peep "and notehet sights are now inalinelncut,with the said center of the cornea and with the said lighted candle. Now the 1 H I ,l

.1 r z t I visual axis of the eye it 1 tin, hall I) and the lltlltllltl and the prep t 'htsaml the ohjeetire light (the lighted eanille) will be in salinenient. The iatient then,upon request, closes his eyes. 'lhe operator next advances the hiealizer, pushing the hall 1) into the lid about the thickness of the lid. lie then relenses thetriggenand the hall through the. agent-y of the spiing F" is retrtu-ted away from the eye the distanee alloa ed hy the rear end of the slot C. The indirators l) and E are now distant from the outer surface of the eye ten million-let's.- 'lherefore they are out of the-rt-aeh ot' the e \'elashes of the eye of the patient. The latter is tllt't'tlt'tl too wu his eyes, It is llt't't'wt-itll'y that the patient ias his eyes open while the skiagratns are heing made. because, as is well known. when the eyelids are elosed, the hall of the eye turns upward. lle thereupon opens his eves. and he is iltsll'ut'ted to look at the dhtil the exposures are made. The hold r ha ring been provided with a sensitized plate. whose eornet's respectively rest on the eorners lt of the holder, is inserted under the litltlt it, it", It. and u N) the supplemental llllllt It", and moved orward until the tirst gage mark it" is tlush with the adjarent edge of the tahle. 'l'he renter ol' the tirst half of the said plate is now lit-low lltt' all t-t'tetl eye. and the apparatus is in readiness t'or the tirst skiagrani to lit taken. The ltoent 'en ray apparatus is duly loratedadmve tn: head of the patient. and the focal point of the generating table is preferably in vertical alinenient with a theoretical line abusing through hoth e \'es of the patient. atu meets the plate at right angles thereto. in this positiouJhe exposure. with the Roentgen ray is made upon -the sensitized plate and thus produees the first skiagratn. The tnheis then shifted, pret'erahly toward the feet. of the. patient, usually four or live int-hes, and tilted slightly, so that. the main Roentgen my will point to the same place whieh it did before. The holder It. 18 now pushed forward vet farth" upon the supplemental tahle and under the h'lwlll metal plate ll, and the seeond and fresh half of the sensitized plate is brought under the att'eeted eye of the patient. The Roentgen ray is now again prodm-ed and now nets upon this set-and and fresh half of the sensitized plate and thus produees the. seeoud skiagrani. The. operation of produeiiu these two skiagralns is now complete and the patient is released from his reeutnlaait position.

.\ t'ter the two skiagratns hare heen produeed, the sttlisetptelll work prior to the ex traetion of the foreign body present in the att'eeted e \'e eonsists in a series of measurements atnl t'ttlt'tllttltotts therefrom whieh enahle the operator to aw-uratetr determine where is the speeitie and exaet. location of the foreign hotly in the eye. 'l'hese measurements t'orni no part of my invention, but

are the ame as have been ill g neral use. for 1 some years past in whit-h triangulation is the hash: prtneiple, viz: the lirst skiagrlnt having lwen made with the suhject in a. reeunihent motion. the source of penetrating light eonung front ahove. paralleling the two eyes and su wrini m-ing the indicator hall wine and their supporting stems, it will readily he en that to prolong the shadow east hy said stems would estahlish the visual axis of the eye, and since the position of the eone is a known distance from the anterior url'aee of the e \'elnill. the margin of the said eyehall whieh is invisible on the ski grain is determined. Therefore by the first pieture. the anterior surface of the eveball the Visual axis of the eye and the lateral medial line of the eyeball is established. and the --hadow east by the foreign body will determine its position relative to the same in all i-espeets except as to lateraldepth. In the second skiagrani. the ball indicator and the indicator cone and their supporting stems (rods D-' and E") are no longer superimposed. aitd computations from the position of the said indicators and of the eyehall and of the foreign hotly on the second skiagrani ennhle the direction of the Roentgen my to he determined. and enahle the position of this foreign Hilly relative to the lateral depth of the said eyehnll to be determined.

When the. eye at the right hand side of the head is the one in whieh the presence of a foreign hotly is to he hiealized, the hracltct pieee Ii" with the pads. and N is removed from the standard K, and is turned ovei and then ad'nsted upon the '.-tandard L. The right side of theta-ad of the iatiem. will then be next to the table It, It, ll, and he will look in a direction toward the left end of the table. The )ad N will come against the forehead an the pad )1 will eonie against. the back of his head. The loealizin instrument earryin the indicator! 1) and h is placed on the ot te: end portion of the table and in the same relation to the att'eeted eye as it was when it was being used in relation to the first nunetl eye, viz.: that. on the left hand side of the head 01 8h. patient. The eandle is also located aimilal'ly as heretofore in front a) E I 0 the patient and at a distance of some feet. The operations of setting the localize! and of working the Roentgen ray, and the photographic plate are substantially the same as those teretot'ore described RllttV. to the left eye of the patient. The method of na-asnretm-nt to asu-rtain the position of the foreign body in the said e e is similar to that lit'st. hereinliefnre. described it! Mlltion to the left. eye.

.\u additional function of certain features of my invention is as follows: when it becomes desirable to take a photograph of the head from front to rear, or more especially from rear to front, thereby obtainin v a skisgram of the anterior portions of the head or ace of the frontal sinuses and of any t oreign bodies in the cc and orbit in such direction, the table 1 and its accompaub ments are handled as follows: The bracket with its pads M and N is removed from its supporting standards K or L, as the case may be. The table is now turned bottom side up. Its long edge S will then rest/upon the a orcsaid compression table or other proper support while the other long edge 5 will be elevate because the table in the neighborhood of such edge S will be supported by the standards K and L, substantially as is illustrated in Fig. 5. Each of the standards has at its free end a. rubber stud T, set in a recess in the said free end. When the table G is inverted as now described, the rubber studs T T, will be on the compression table and thus avoid scratching or marring the compm-eiion table. ()n the under side of table (l. and which side is now uppermost, is a standard V, somewhat shorter than any ieg G of the table (i. The bracket K is now adjusted upon this standard V, this standard extendin through the eye of lag K. The set screw is now tightened and the bracket K is stationary on the said standard V. The patient lying on his stomach on the compression table, then bends his head forward and down and quite close to the table. The side pads M and N are properly advanced to the res iective sides 0 the head and then fixed in p ace in the manner heretofore mentioned. The Roentgen ray a paratus is duly located above the head 0 the patient. A sensitized late is located on the holder R, and this toldQ with said plate is placed within the table as between the latter and the supplemental table H. The film side of the said plate must be uppermost. An exposure is now made, and a skiagram of the head, and showing portions of it as heretofore desired, is obtained. The scope of the functions which this table can perform is therefore obviously ver great, and its utility is marked. In t e making of this last. named skiagram, the entire sensitized plate is used. It will be understood that the material on this under side otf the table, which covers the skiagram, is casijly pcnetrable by the ltocntgen ray. 4

What I claim as new, and of my invention and desire to secure by Letters latcnt, is:--

1. Ju an apparatus for correctly localizing foreign bodies in the eye and orbit by means of Roentgen rays, n localizing instrument consisting of two indicators, carried on a support, means for adjusting thcsc indicators vertically relatively to the said support, means adapted to allow these indicators to said means vertically at a desired height on said rod, a spring adapted to retract said rod and said indicators, and a latch, adapted to'hold the rod and the indicators in the advanced position and to be disengaged when the indicators are to be retracted.

3. In an ap aratus for the purposes mentioned, a loca izing instrument, having two indicators in the same vertical plane and at a gifi'pn distance apart, a rod for upholdin theso indicators, a guide in which this is slidable, a detent adapted to limit the" travel of said indicators, a supporting standard, a sleeve connecting said guide to the said rod, and means for setting said sleeve vertically at, a dcsinul height on said rod, a. spring adapted to retract said rod and said im icators, and a latch. adapted to hold the rod and the indicators in the advanced osition and to be disenga ed when the im icators are to be rctraetet the said instrument provided with a front sight near the said mdicatots, and ,a rear sight further back on the instrument, in aliuemcnt with the upper indicator.

4. In an ap arutus for the purposes mentinned, a localizing instrument, having two indicators, distin uishcd from one another in shape, each in: icntor having a supportin rod, a bracket which receives said rods, an set screws for ti htenin the bracket on said rode, a main at its rout end fixed to the said rod, and at its rear carrying a bracket having a cross bar a guide tube in which said main rod is slidable. a graduated standard, a holder for the guide tube, said holder slidable vertically on the said standard, a set screw for fixin v the holder at a given point on said stain ard, a trigger latch connected to the guide tube, and having a catch adapted to en I said cross bar when the main rod witi tie indicators is advanced, a s u-ing on said main rod between the rear clui of the guide tube and the bracket on the rcar end of the main rod, which spring is adapted to act and retract the main rod and the said indicators when the catch of the latch trigger is disengaged, and means for limiting the travel of the indicators to a given prmlctcrmined distance.

5. In a localizing instrument for the purposes hereinbeforc mentioned, in which inatramenta are two indicators one ahovethe. other and so formed as to distinguishable rom each other, a pair of sights adapted to enable the upper indicator to be put into alinement with them and with the cen' ter of the cornea of the atleeted eye, means for enabling the indicators. after being first pushed against the eyelid to be retracted so as to clear the evelashe.-t, a support for the imliutdnfa'ndmeana for adjusting the indicatora Vertically.

,6. A localizing; instrument for the purposes mention in which instrument are two indicators one above the other, and so formed as to he distinguishable from each other, a pair of sights adapted to enable the upper indicator to be put into alinenu-nt with them and with the center of the cornca of the affected eye, menus for enablin" the indicators, after being first pllslun a inst the eyelid to be retracted so as to c ear the e clashes, a sup mrt for the indicaters, an means for at justing the indicaters vertically to be automalieall retracted so as to be out of contact wit l the eyalaaheada latch for releasing the indicators so at they can be retracted, means for adjusting the indicators vertically.

7. In an apparatus for the mrpose-i mentioned, a tab e having two cm portioua eovered by material aubotantially opaque to the penetration of the Roentgen ray on a short ex re and a middle portion of a muteria eaai y penetrable b the said ray, u ataudard connected to tie table, a bracket adapted to be set thereon, and adjustable up and down on the said standard, pads supported by the bracket, means for advancing and retracting these pads relatively to the bracket.

, 8. In an a paratua for the urposcs mentioned, a tab e having two end portions emered by maternal substantially opa ue to the penetration of the Roentgen ray on a short exposure, and a middle portion of a material easily peaetrablc by the said my, two Slitlltl' ard's connected to thetuhle, the one on the said impenetrable material on the one side, and the other on the impenetrable material on the. other side, a bracket", pads, rods reapectively carrying said pads and slidable reapactival in the adjacent and portions of the bra set screws for setting said roda relatively to the bracket, each pad conneetcd to its red I) a universal joint, the bracket, adapted to ad'usted to either standard and to be adjustab y set thereon.

9. In an apparatus for the purposes hereinbetore mentioned, the tube having end portions each covered with a material substantially impenetrable to the ltoentgen ray during a. short exposure, and a middle portion covered by a material easily penetrated b the said ray, meana for holding the head 0 the patient on said table, a supplemental tho Silltl lllltltlltl part oft oeenoo table or support below the first. named table, a plate hoh or adapted to be sup iortcd by the said supplemental table and to slide thereon the plate holder havin' ledges adapted to support the sensitized p ate.

it). In an apparatus for tllt ,phrposcs hereinbefore mentioned, the table havin end portions each covered with a materiu substantially im wuetruble to the Roentgen ray during a short exposure, and a middle portion covered by a material easilv enetrated b the said ray, means for holiling the ll(.llt of the patient on said table a supplemeutal table or so iport below the lirst. named table, a plate. holder adapted to be supported by thea d supplemental table and to lide thereon, the plate holder having ledges adapted to support the sensitized plate, the plate. holder huvin' a rod provided with gages, respeetiveiy indicating when the first half of. this plate is under the said middle portion of the table and when the serum] half of the plate is under the middle portjon of the table.

11. In an apparatus for the purposes hereinbefore mentioned, the table havin end portions each covered with a umteriasubstantially impenetrable to the Roent 'en ray during a short exposure, and a mh dlo portion covered by a material easily renetruted by the said ,ray, means for ho ding the head of the patient on said table. a supplenn-ntul table or su'ipo 't. below the first named table, a plate holder adapted to be -supported by the. said sumitementul table and to slide thereon, the plate holder havin ledges adapted to support the sonsitizei plate, the plate holder having a rod "'0- vided with two projections, one, of w iieh indicates when the iii-st half of the said plate is under the middle portion of the table, and the other of Wlllt'll indicates when the second half of the. said plate is directly under the middle portion of the said table.

12. In an apparatus for the purposes mentioned, a table provided with two standards, a braekct earrying mds adjustable thereto, the ln-aeltet provided with means for enabling it to be received upon either standard and to be vertically set thereon at a desired height, the table having two end portions substantially impervious to the penetration of the llm'nb'en ray during a short exposure, and a midille portion easily penetrnble by the said ra a plate holder for eurryiu" the sensitizet plate, a support therefor aihipted to hold the date when slid under the table, and gages lor regulating the udvanee of the plate holder under to table.

13. In an aimrnlus for the purposes nu-ntioned, a talile provided with twostululards, a bracket carrying nnls' adjustable thereto, the bracket provitled with means for enabling it to be received upon either standard and to he vertieallu. set thereon at I desired height. the table having um end portions sahstantially impervious to the [mnetratimn of the ltoent en ray during a short ex msare, and a mid die portion ea ily wnetrahle by the said ray. a plate holder for t:lll \'llt" the sensitized plat a rltllllfll'l therefor :napted to hold the plate when slid under the table, and gages f r regulating the advanee .if the plate holder under thesaid middle part of the table. a loealizin instrument adapted to stand upon said ta db. and ln'ovided with the two indieators, one'ahove the other in the same vertical frame.

-' H. In an apparatus for the purposes I g n u mentioned. a tahle provided with a -tandard. a hraeltet adjaslahle to the stamhn-d. pads'mljnstahle on the hraeltet. a portion of the tahle penetl'ahle in the Roentgen rav on a short exgmsnre. a plate holder for holding the sensitized plate. and means for upholding said plate holder to the tahle. a hu-aliziag il|.-lI'ltI|tt't|l having two indieators. and means for retrial-ting them at will a given distant-e.

lb. In an ap mratns for the purposes mentioned. a tab e. a ln'aeket and pads". the

lahh! having a portion of its snrt'aee envered with a material inqa'm-trahle to the ltm'ntgen ray for a short ex msln'e. and another portion of its sarl'aee eovered by a material a-| |etral ih to the Roentgen ray, these nmterlals oining eaeh other he a straight line at right angles to the length of the tahle. a loealizing instrmnent having two indieators in the same vertieal plane, and a ham whosejront side or ed 'e is eat at right angles to the 'axial lengtt of the hnealming instrument, and whieh edge is adapted to he set parallel to the straight line of the said material of the table.

16. In an up nil-alas for the purposes mentioned, a ta ile. provided on one side with two standards, the middle portion of the tahle adapted to allow the Roentgen my to easily paethrough it, a Ml nth-mental snpporh for holding the. plate ladder for earrying the sensitized plate in eonneetion with said tahle. the reverse side of the table having another standard. a hraeket and aids. the pads heing adapted to he earr -d hr the hl'aeltet. and adjnstahle relatively thereto, and the lll'tlt'litl and the said several standards heing mntnally interada tied for enabling the hraeket to he adjusted on any one of them and to he moved up and down thereon. and to he set thereon at the desired height. v

[7. In an ap iaratns' for the purposes mentioned. a ta llU- ln'ovided on one side with two standards. eaeh having in itsouter end a reeess. and a rnhher terminal pieee set in said reees-t and e-xtendin out heytmd the adjaeent end of the stamliird. the middle mrtion of the table adapted to allow the ltoentgen rm to easily pass thron 'h it, a sup ileinenta support for holding t N. plate hoh er t'or earl-yin" the sensitized plate, in mnneetion with said table. the reverse side of the table having another standard. a. ln'aeket and pads, the pads hein I ada ill! to he earried hy the hraeket and mljnstallle relatively thereto, and tlledn'aeket and the said several standards heing mutually interadapted for enahlin the hraeket to he adjusted on any one o theta. and to he moved up and down thereon, and to he set, thereon at the desired height.

JOHN ROBERT KELLEY. Attest:

Aunarr I. SIIOLKLBY, Ix. SMITH. 

